Optimal Fitting Method and System of Propagation Matrix Modulus Based on Differential Evolution Algorithm

A differential evolution algorithm and propagation matrix technology, applied in the field of power transmission, can solve problems such as consuming a lot of time and achieve the effect of improving efficiency

Active Publication Date: 2021-11-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0009] The problem is that, for a given target fitting accuracy, a fitting method with incremental number of poles usually consumes a lot of time trying different numbers of poles one by one

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  • Optimal Fitting Method and System of Propagation Matrix Modulus Based on Differential Evolution Algorithm
  • Optimal Fitting Method and System of Propagation Matrix Modulus Based on Differential Evolution Algorithm
  • Optimal Fitting Method and System of Propagation Matrix Modulus Based on Differential Evolution Algorithm

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Embodiment Construction

[0082] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0083] The purpose of the present invention is to provide a method and system for optimal fitting of the propagation matrix modulus based on the differential evolution algorithm. The differential evolution algorithm is introduced to determine the optimal fitting parameters, which are the number of poles and the delay time, and the corresponding fitting parameters are obtained. fit model.

[0084] In order to make the above objects, features and advantages of t...

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Abstract

The present invention relates to a propagation matrix modulus optimization fitting method and system based on differential evolution algorithm, comprising: determining target fitting accuracy tol and fitting frequency range; determining the range of pole numbers; determining the range of delay τ; The range of τ determines the maximum value of the delay encoding vector; the maximum value of the pole number encoding vector is determined based on the range of the number of poles; the number of solutions is determined to be N; the relevant parameters in the initial iteration process are initialized; the iterative calculation is performed based on the relevant parameters; The solution x in the population with the smallest δ * , get the number of poles and delays it contains, and perform the above steps to get new poles; according to the number of poles, delays and new poles obtained by the above steps, use vector fitting technology to calculate the modulus of the propagation function matrix Fitting, calculate the fitting error, and output the fitting result and fitting error. The above-mentioned method in the present invention introduces a differential evolution algorithm, which can solve this nonlinear optimization problem well, and improves efficiency.

Description

technical field [0001] The invention relates to the field of electric power transmission, in particular to a method and system for optimizing and fitting a propagation matrix modulus based on a differential evolution algorithm. Background technique [0002] Power transmission lines are important power transmission equipment. In the power system, except for electrical equipment and power plants, the rest are all power grids composed of transmission lines, so transmission lines play an irreplaceable role in the power system. The frequency range of the overvoltage caused by power equipment failure, lightning strike or improper operation is much larger than the frequency range of the normal operation of the system, and contains a large number of high-frequency components. Therefore, in the transient calculation, a traveling wave model is established for the power transmission line. The traveling wave model regards the change of voltage and current on the power transmission lin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/16G06N3/12
CPCG06F17/16G06N3/126
Inventor 葛青宇焦重庆
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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